Product Name
3M Scotch-Weld DP270 Black 60-Minute Electric & Thermal Resistant Epoxy
Brief Description
3M Scotch-Weld DP270 Black is a two-part, low-viscosity epoxy potting compound and adhesive system. It is specifically engineered for potting, sealing, and encapsulation of sensitive electronic and electrical components. This rigid epoxy offers excellent electrical insulation properties, good thermal shock resistance, and is non-corrosive to copper.
Popular Applications & Uses
- Potting and bonding electrical and electronic components- Encapsulation of heat-sensitive or delicate components like glass diodes and sensors- Sealing and potting transformers, coils, chokes, and relays- Electronic device manufacturing- Medical equipment assembly- Automotive electronics- Aerospace component production- General industrial bonding applications
Industries that Commonly Use It
- Aerospace/Defense- Automotive Service/Repair- Electrical Services or Products- Engineering Services- General Manufacturing- LED/Electronics- Medical Device/ Prosthetics- Metal Fabrication- Plastic Fabrication- Transportation/ Specialty Vehicle
Special and Unique Features
- Non-corrosive to copper, making it safe for sensitive electrical components- Minimal exotherm, protecting temperature-sensitive materials during curing- Good thermal shock resistance, maintaining performance under temperature changes- Excellent electrical insulation properties, even under high humidity- Meets UL 94 HB flammability standards, offering added safety- Long work life of approximately 60-70 minutes, allowing for precise positioning and adjustments- Low viscosity for easy dispensing and potting- Very low shrinkage
Key Properties
- Adhesive Type: Two-part Epoxy- Color: Black (opaque)- Mix Ratio (Volume B:A): 1:1- Work Life: 60-70 minutes at 23°C (73°F)- Tack-Free Time: Approximately 3 hours- Time to Handling Strength: Approximately 3 hours- Full Cure Time: 48 hours at 23°C (73°F)- Shear Strength: 2,500 psi (on aluminum)- Viscosity (Base): 7,000 - 16,000 cps at 23°C (73°F)- Shore D Hardness: 83
Surface Compatibility
- Metals (e.g., copper, aluminum)- Plastics- Glass- Wood- StoneFor high strength structural bonds, surfaces should be thoroughly cleaned of contaminants like paint, oxide films, oils, and dust. Solvent wiping with acetone or MEK is recommended.
Known backups / known substitutes
- 3M Scotch-Weld DP270 Clear Potting Epoxy (same product, different color)
Comparison Note
Epoxy adhesives, including 3M Scotch-Weld DP270, are classified as structural adhesives. They generally offer superior overall strength, high shear and peel strengths, and better resistance to high temperatures, solvents, and outdoor weathering compared to other structural adhesive types like polyurethane, acrylic, and cyanoacrylate.
